Dust devils on the red planet help spin off poison precipitation that makes life on the surface impossible, scientists say.

Scientists peering into the early universe have found an enormous collection of galaxies and gas bubbles 200 million light-years wide.

This week: bouncing 'bots proposed for Mars, prehistoric marrow discovered, opening the moon for business, inside Hezbollah, house cat chases bear, and more.

New images from the Cassini spacecraft reveal Saturn's largest moon, Titan, to be the only body in our solar system other than Earth with lakes on its surface.

Profitmaking is "critical" to any moon-mission plans, according to NASA. Among the opportunities: space sports, mining, and more.

A new map offers a sneak peek into our next-door neighbor's backyard, where 360 million suns could potentially be born.

Swarms of small, bouncing robots could hop across the surface of Mars to search for signs of life, researchers say.

New radar images from the Cassini spacecraft reveal that Titan's continent-size Xanadu region has river valleys, hills, plains, and mountains similar to Earth's.

With Discovery safely home, relive the historic mission through stunning images of the liftoff, spacewalks, a backflip, and more.

Science experiments from Discovery's 13-day mission may help astronauts stay healthy during long-distance space flights, such as trips to the moon and Mars.

The U.S. Space agency is testing new safety measures after Discovery struck a stray vulture—which then became a potentially damaging piece of debris—during a 2005 launch.

A new hypersensitive sensor that can remotely detect electrical impulses in cells may one day scan for extraterrestrial life or rogue cancer cells.

Switching to backup electronics brought the instrument back online after several days of inactivity.

Will Discovery's upcoming flight mark a triumphant start to the shuttle program's twilight years, or will it signal that the program is too troubled to continue?

The International Astronomical Union formally named two small moons of Pluto discovered last year.